Computing-machine



Patented 1an. lo, |899.

' No. slmzs.

l .1.l E; DUNCAN.

CUMPUTING MACHINE.,

(Application filed Feb.y B, 1898.)

(No Model.)

58 76 7 a nl diam E 4 5 8 .9 Il 15 l5 II2 I9 2l 5 I O A5 ZO' Gl u :72 2a zal 34 ag M1551 UNITED STATES PATENT @Erler-3.4

.minis EUGENE DUNcAN, or CENTRALIA, Wisconsin,

COMPUTING-MACHINE.

SPECIFICATION for-ming part of Letters Patent No.y 617,323, dated January 10, 1899,. i

Application iiled February 8, 1898. Serial No. 669,522. (No model.)

To all 107110712, zit may concern,.-

Be it known that I, JAMES EUGENE DUN- time which is the fraction of a week, day, or

other unit of time may be avoided.

yliurthcr objects and advantages of this invention will appear in the following description, and the novel 'features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure l of a machine constructed in accordance with my invention. Fig. 2 is a vertical sectional viewof the same. Fig. 3 is a partial front view showing a modified construction of counterbalancing devices .consisting of a Weight. Fig. 4 is a .plan view of a portion of the result-sheet. A

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

Mounted in a suitable 'frame having end .plates l, and alsounounted in the frame to pass under the bar is a result-sheet ll, having longitudinal and transverse intersecting columns of characters, of which the transverse columns register with the time and rate graduations of thc bar 7, while the longitu-` dinal columns are located parallel with said bar and are adapted to be exposed successively between the time and rato scales in is a front View the slot 8. Said result-sheet traverses an operating-roller l2, which is connected by interlneshing gears 13 and lfl (carried, respectively, by said operating-roll and with the feed-roll) with thel feed-roll, whereby as the slide is moved axially the operating-roll is actuated to bring different longitudinal columns'of its charactersintoregistration with the slot 8. n'e end of the result-sheet l1 is attached to the operating roll 12 and the other end to a carrier-roll l5, whereby as the slide is moved longitudinally upon the feedroll the res il't-sheet is reeled from one roller to the other to bring the desired graduations contiguous to the rate-bar. Also the operating and carrier rolls are provided with yielding tension devices, which in the construction illustrated in Fig. l consist of coiled springs 16, said springs being arranged to strain the result-sheet in opposite directions, Whereby one ,is tightened'as the other is loosened to maintain a constant tension upon the result-sheet, and thus insure the` holding of the same taut during the operas tion of the mechanism.

In the modified construction (illustrated in Fig. 3) the tension devices consist of weights 17, connected by cords 18 with spools or drums 19, affixed, respectively,.to the spindles of the operatingand carrier rolls.

In the construction illustrated the resultsheet is graduated to indicate the Wages per hour and day for given rates per day, based on the scale of ten hours per day, and when this sheet, .of Which only a portion -is illustrated in Fig. 4,' is used in connection with the cooperating devices shown in Fig. l the movement of theslide along the feed-roll to arrange the pointeropposite the numeral l of the time-scale will advance the result-sheet block. The numeral of the rate-scale registering with the numeral l.of the time-- scale is l0, and indicates a rate of ten cents per day, for instance, and hence the graduation 10 on the result-sheet indicates that one days wages at the rate of ton cents per IOC vten cents per day for one hour is one ceu-t.

ln other words, the numerals of the timescale representboth days and hours and the numerals in the blocks of the result-sheet respectively indicate wages per day and hour or per fraction of a day and per fraction of an hour. Therefore when the pointer is in the positionshown in Fig. 1, opposite the numeral l of the time-scale, the wages due for either one hour or one day and calculated upon the basis of any rate per day comprehended by the machine will be exposed in the slot S. For instance, if the rate per day is twenty cents the wages for the length of time indicated by the pointer will be shown on the result-sheet opposite the'numeral 2O of the rate-scale 10, said block containing the-numerals and 2 to show that the wages per day is twenty cents and forone hour is two cents. If the slide is moved to arrange the pointer opposite the numeral 2 of the time-scale, the result-sheet will beadvanced a corresponding distance, and hence that longitudinal column thereof having the numerals 5 and l in the first transverse column will be exposed through the slot S. Then in the block of the result-sheet contiguous to the pointer will be found the results 40 and 4, thus indicating that at the rate of twenty cents perday (the 2O being found in the rate-scale opposite the pointer) the wages for two days will be forty cents, while for two hours it will be four cents. lVith the partsin this position the longitudinal column of the result-scale will show the' wages'at all the different rates per day for two hours and two days. Thus in the block of the resultsheet under the rate-numeral 10 of the rate-scale will be found the numerals 2O and 2, thus indicating that the wages for two days at ten cents per day is twenty cents and for two hours is two cents.

It will be understood that the rate-*scale can be extended to indicate any desired amount per day upto, say, three dollars and sixty cents or four dollars, or as high as may be required by the conditious under which the apparatus is used.

The relative movements of the slide and the "operating-roll depend upon the gearing by which the feed roll or screw 2 and the operating-roll l2 are connected. It is my object to cause the advance of the yresult sheet through a distanceequal to the 'interval between two horizontal columns of numerals, while the slide advances through the distance between two contiguous graduations'of the time-scale. Therefore if the slide is moved from its initial point or zero of the time-scale to the graduation l the result-sheet will be advanced a corresponding distance; but this distance on. the result-sheet, as on the ,ratescale, which is parallel with the time-scale, is divided into four parts for convenience in calculation. It is unnecessary to subdivide the time-scale,as it is usual to estimate lime by either days or hours in calculating wages; but the rates may have a fractional range. The

graduations on the several parts of the apparatus above described are arranged according to the decimal system, and starting with a rate of ten cents per day I place the numeral .10 of the rate-scale opposite the numeral l l of the time-scale; but, for example, it may he desirable to calculate upon the basis of live cents per day, and therefore I divide the space between O and 10 of the rate-scale to indicate the rate five. So the rate may be either two and one-half or seven and one-half cents per day, and therefore l find it convenient to still further subdivide the interv'al between O and lO of the rate-scale to indicate the rates two and one-half and seven and onchalf. F It will be understood thaty this subdivision may be still further extended; but it will be suiiicient for the purposes of illustration to indicate those shown in the drawings. Therefore when the slide moves from Oljto l of the time-scale the result-sheet is atlvanced from O to l0, or through four subdivisions correspondingwith the subdivisions of the interval between O and l0 of the rate-scale. It is obvious that the movement of the result-sheet to bring different horizontal columns into operative or indicating position must be equal to the advance of the slide with relation to the rate-scale. If, therefore, the slide advances to the numeral lf of the time-scale, it is opposite the numeral l0 of the rate-scale, or has passed four subldivisions of the rate-scale, and hence the result-sheet must advance through four horizontal columns in order to correspond. If the slide is advanced to the numeral 5 of the time-scale, whereby it is disposed opposite the numeral 50 of the rate-scale, the resultsheet must advance in a direction perpendicular to that of the slide through a distance equal to twenty horizontal columns, or if, as above indicated, the slide is advanced to the numeral 2 ofthe time-scale, where it is opposite the numeral 20 of the rate-scale, the result-sheet must correspondingly advance in a perpendicular direction to bring the eighth horizontal column into view through the inspection-slot 8.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing-from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I cla-im isl. A computing-,machine having parallel operating and carrier rolls, a continuous result-sheet terminally attached'respectively to said rolls and reeled thereon for movement p from one roll to the other, yielding tension devices connectedy with said rolls for maintaining the sheet under tension, said sheet being provided with intersecting longitudinal and transverse columns'of result-indicating char- IOO' IIO

IIS

ters, yielding tension devices connected Withsaid rolls for :maintaining the result-sheet act-ers,a fixed rate-bararrangcd contiguous to the operating-roll and adj aeent to the surface of the result-sheet traversing the same, said bar being provided With parallel time and rate scales of which the graduations register respectively with the transverse columns of characters on the result-sheet, a feed-rollconnected by intermeshing gearswith the operatingroll, and a slide mounted upon the feedroll, having a pin-andgroove connection with the same 'to impart rotary motion to the feedroll, and hence to the operating-roll as the slide is moved axially, and also provided with a pointer traversing the rate-bar, substantially as specified. y

, 2. A` computing machine having parallel operating and carrier rolls, a continuous resuit-sheet terminally attached respectively' to said rolls and provided with intersecting longitudinal and transverse columns of characunder tension, a fixed rate-bar arranged con tiguous to the surface of the result-sheet andl parallel with the rate-bar, the result-sheet A being providedv in the blocks of its longitudinal columns with a plurality of numerals respectively representing Wages per day and hour, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of tWo Witnesses.

JAMES EUGENE DUNCANi 'y Witnesses:

ORRIN GRAY, NASH MITCHELL, 

